6646430099 has 2 divisors, whose sum is σ = 6646430100. Its totient is φ = 6646430098.

The previous prime is 6646430081. The next prime is 6646430243. The reversal of 6646430099 is 9900346466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6646430099 - 2²⁸ = 6377994643 is a prime.

It is not a weakly prime, because it can be changed into another prime (6646430069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323215049 + 3323215050.

It is an arithmetic number, because the mean of its divisors is an integer number (3323215050).

Almost surely, 2^6646430099 is an apocalyptic number.

6646430099 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646430099 is an equidigital number, since it uses as much as digits as its factorization.

6646430099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 47.

The square root of 6646430099 is about 81525.6407457188. The cubic root of 6646430099 is about 1880.1657937194.

The spelling of 6646430099 in words is "six billion, six hundred forty-six million, four hundred thirty thousand, ninety-nine".